Merge pull request #330 from shreyan-naskar/master

Encoder and Decoder for .txt files

Author: advaita-saha

scripts/Text_Encode_Decoder/README.md

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+# ENCRYPT AND DECRYPT DATA IN A TEXT FILE IN PYTHON
+
+- Menu driven script.
+- Enables user to store data using personalised encryption key.
+- Allowed user to decrypt and view data given correct key.

scripts/Text_Encode_Decoder/main.py

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+Pwd_Key = 4 #modify to set personalised Key
+
+#Function to Encode the user given data
+def Cipher(Text) :
+ 
+ Cipher_Text = '' 
+ for i in Text:
+ a = chr(ord(i) + Pwd_Key )
+ Cipher_Text += a
+ 
+ T = Cipher_Text + '\n'
+ return T
+
+#Function to store the encrypted data.
+def Entry(Data):
+file = open('Data.txt', 'a')
+file.write(Data)
+print('\nEntered data has been successfully encrypted and recorded..!!!\n')
+file.close()
+'''
+
+print(En_Data)
+'''
+#Function to display the encrypted data.
+def Extract():
+
+En_Records,De_Records = [],[]
+
+file = open('Data.txt', 'r')
+x = file.readlines()
+
+for i in x:
+En_Records.append(i)
+
+for i in range(0,len(En_Records)):
+En_Text = En_Records[i]
+De_Text = ""
+
+for j in range(0, len(En_Text)):
+De_Text += (chr(ord(En_Text[j]) - Pwd_Key))
+
+De_Records.append(De_Text)
+
+file.close()
+
+return De_Records
+
+
+while(True):
+print(" 1 -> Enter Data ")
+print(" 2 -> Display Stored Data ")
+print(" 0 -> Exit \n")
+
+opt = int(input("Enter the option : "))
+print("\n")
+
+if opt == 1 :
+Data = input("Enter your data :\n")
+En_Data = Cipher(Data)
+Entry(En_Data)
+
+elif opt == 2 :
+user_key = int(input("Enter the Key to decrypt : "))
+
+if user_key == Pwd_Key :
+L = Extract()
+for i in range(0,len(L)):
+print(L[i][:-1])
+print("\n")
+
+else :
+print("Wrong key !! ")
+
+elif opt == 0 :
+exit()
+
+else :
+print("Enter valid option !!")
+
+
+
+
+
+
+
+